Layer.h revision 503c7046237f2797a5cf8584064223359d0e6d10
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_LAYER_H 18#define ANDROID_LAYER_H 19 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <EGL/egl.h> 24#include <EGL/eglext.h> 25 26#include <utils/RefBase.h> 27#include <utils/String8.h> 28#include <utils/Timers.h> 29 30#include <ui/FrameStats.h> 31#include <ui/GraphicBuffer.h> 32#include <ui/PixelFormat.h> 33#include <ui/Region.h> 34 35#include <gui/ISurfaceComposerClient.h> 36#include <gui/LayerState.h> 37 38#include <list> 39 40#include "Client.h" 41#include "FrameTracker.h" 42#include "LayerVector.h" 43#include "MonitoredProducer.h" 44#include "SurfaceFlinger.h" 45#include "Transform.h" 46 47#include <layerproto/LayerProtoHeader.h> 48#include "DisplayHardware/HWComposer.h" 49#include "DisplayHardware/HWComposerBufferCache.h" 50#include "RenderArea.h" 51#include "RenderEngine/Mesh.h" 52#include "RenderEngine/Texture.h" 53 54#include <math/vec4.h> 55 56using namespace android::surfaceflinger; 57 58namespace android { 59 60// --------------------------------------------------------------------------- 61 62class Client; 63class Colorizer; 64class DisplayDevice; 65class GraphicBuffer; 66class SurfaceFlinger; 67class LayerDebugInfo; 68 69// --------------------------------------------------------------------------- 70 71class Layer : public virtual RefBase { 72 static int32_t sSequence; 73 74public: 75 mutable bool contentDirty; 76 // regions below are in window-manager space 77 Region visibleRegion; 78 Region coveredRegion; 79 Region visibleNonTransparentRegion; 80 Region surfaceDamageRegion; 81 82 // Layer serial number. This gives layers an explicit ordering, so we 83 // have a stable sort order when their layer stack and Z-order are 84 // the same. 85 int32_t sequence; 86 87 enum { // flags for doTransaction() 88 eDontUpdateGeometryState = 0x00000001, 89 eVisibleRegion = 0x00000002, 90 }; 91 92 struct Geometry { 93 uint32_t w; 94 uint32_t h; 95 Transform transform; 96 97 inline bool operator==(const Geometry& rhs) const { 98 return (w == rhs.w && h == rhs.h) && (transform.tx() == rhs.transform.tx()) && 99 (transform.ty() == rhs.transform.ty()); 100 } 101 inline bool operator!=(const Geometry& rhs) const { return !operator==(rhs); } 102 }; 103 104 struct State { 105 Geometry active; 106 Geometry requested; 107 int32_t z; 108 109 // The identifier of the layer stack this layer belongs to. A layer can 110 // only be associated to a single layer stack. A layer stack is a 111 // z-ordered group of layers which can be associated to one or more 112 // displays. Using the same layer stack on different displays is a way 113 // to achieve mirroring. 114 uint32_t layerStack; 115 116 uint8_t flags; 117 uint8_t mask; 118 uint8_t reserved[2]; 119 int32_t sequence; // changes when visible regions can change 120 bool modified; 121 122 // Crop is expressed in layer space coordinate. 123 Rect crop; 124 Rect requestedCrop; 125 126 // finalCrop is expressed in display space coordinate. 127 Rect finalCrop; 128 Rect requestedFinalCrop; 129 130 // If set, defers this state update until the identified Layer 131 // receives a frame with the given frameNumber 132 wp<Layer> barrierLayer; 133 uint64_t frameNumber; 134 135 // the transparentRegion hint is a bit special, it's latched only 136 // when we receive a buffer -- this is because it's "content" 137 // dependent. 138 Region activeTransparentRegion; 139 Region requestedTransparentRegion; 140 android_dataspace dataSpace; 141 142 uint32_t appId; 143 uint32_t type; 144 145 // If non-null, a Surface this Surface's Z-order is interpreted relative to. 146 wp<Layer> zOrderRelativeOf; 147 148 // A list of surfaces whose Z-order is interpreted relative to ours. 149 SortedVector<wp<Layer>> zOrderRelatives; 150 151 half4 color; 152 }; 153 154 Layer(SurfaceFlinger* flinger, const sp<Client>& client, const String8& name, uint32_t w, 155 uint32_t h, uint32_t flags); 156 virtual ~Layer(); 157 158 void setPrimaryDisplayOnly() { mPrimaryDisplayOnly = true; } 159 160 // ------------------------------------------------------------------------ 161 // Geometry setting functions. 162 // 163 // The following group of functions are used to specify the layers 164 // bounds, and the mapping of the texture on to those bounds. According 165 // to various settings changes to them may apply immediately, or be delayed until 166 // a pending resize is completed by the producer submitting a buffer. For example 167 // if we were to change the buffer size, and update the matrix ahead of the 168 // new buffer arriving, then we would be stretching the buffer to a different 169 // aspect before and after the buffer arriving, which probably isn't what we wanted. 170 // 171 // The first set of geometry functions are controlled by the scaling mode, described 172 // in window.h. The scaling mode may be set by the client, as it submits buffers. 173 // This value may be overriden through SurfaceControl, with setOverrideScalingMode. 174 // 175 // Put simply, if our scaling mode is SCALING_MODE_FREEZE, then 176 // matrix updates will not be applied while a resize is pending 177 // and the size and transform will remain in their previous state 178 // until a new buffer is submitted. If the scaling mode is another value 179 // then the old-buffer will immediately be scaled to the pending size 180 // and the new matrix will be immediately applied following this scaling 181 // transformation. 182 183 // Set the default buffer size for the assosciated Producer, in pixels. This is 184 // also the rendered size of the layer prior to any transformations. Parent 185 // or local matrix transformations will not affect the size of the buffer, 186 // but may affect it's on-screen size or clipping. 187 bool setSize(uint32_t w, uint32_t h); 188 // Set a 2x2 transformation matrix on the layer. This transform 189 // will be applied after parent transforms, but before any final 190 // producer specified transform. 191 bool setMatrix(const layer_state_t::matrix22_t& matrix); 192 193 // This second set of geometry attributes are controlled by 194 // setGeometryAppliesWithResize, and their default mode is to be 195 // immediate. If setGeometryAppliesWithResize is specified 196 // while a resize is pending, then update of these attributes will 197 // be delayed until the resize completes. 198 199 // setPosition operates in parent buffer space (pre parent-transform) or display 200 // space for top-level layers. 201 bool setPosition(float x, float y, bool immediate); 202 // Buffer space 203 bool setCrop(const Rect& crop, bool immediate); 204 // Parent buffer space/display space 205 bool setFinalCrop(const Rect& crop, bool immediate); 206 207 // TODO(b/38182121): Could we eliminate the various latching modes by 208 // using the layer hierarchy? 209 // ----------------------------------------------------------------------- 210 bool setLayer(int32_t z); 211 bool setRelativeLayer(const sp<IBinder>& relativeToHandle, int32_t relativeZ); 212 213 bool setAlpha(float alpha); 214 bool setColor(const half3& color); 215 bool setTransparentRegionHint(const Region& transparent); 216 bool setFlags(uint8_t flags, uint8_t mask); 217 bool setLayerStack(uint32_t layerStack); 218 bool setDataSpace(android_dataspace dataSpace); 219 android_dataspace getDataSpace() const; 220 uint32_t getLayerStack() const; 221 void deferTransactionUntil(const sp<IBinder>& barrierHandle, uint64_t frameNumber); 222 void deferTransactionUntil(const sp<Layer>& barrierLayer, uint64_t frameNumber); 223 bool setOverrideScalingMode(int32_t overrideScalingMode); 224 void setInfo(uint32_t type, uint32_t appId); 225 bool reparentChildren(const sp<IBinder>& layer); 226 bool reparent(const sp<IBinder>& newParentHandle); 227 bool detachChildren(); 228 229 // If we have received a new buffer this frame, we will pass its surface 230 // damage down to hardware composer. Otherwise, we must send a region with 231 // one empty rect. 232 virtual void useSurfaceDamage() = 0; 233 virtual void useEmptyDamage() = 0; 234 235 uint32_t getTransactionFlags(uint32_t flags); 236 uint32_t setTransactionFlags(uint32_t flags); 237 238 bool belongsToDisplay(uint32_t layerStack, bool isPrimaryDisplay) const { 239 return getLayerStack() == layerStack && (!mPrimaryDisplayOnly || isPrimaryDisplay); 240 } 241 242 void computeGeometry(const RenderArea& renderArea, Mesh& mesh, bool useIdentityTransform) const; 243 Rect computeBounds(const Region& activeTransparentRegion) const; 244 Rect computeBounds() const; 245 246 int32_t getSequence() const { return sequence; } 247 248 // ----------------------------------------------------------------------- 249 // Virtuals 250 virtual const char* getTypeId() const = 0; 251 252 /* 253 * isOpaque - true if this surface is opaque 254 * 255 * This takes into account the buffer format (i.e. whether or not the 256 * pixel format includes an alpha channel) and the "opaque" flag set 257 * on the layer. It does not examine the current plane alpha value. 258 */ 259 virtual bool isOpaque(const Layer::State& s) const = 0; 260 261 /* 262 * isSecure - true if this surface is secure, that is if it prevents 263 * screenshots or VNC servers. 264 */ 265 bool isSecure() const; 266 267 /* 268 * isVisible - true if this layer is visible, false otherwise 269 */ 270 virtual bool isVisible() const = 0; 271 272 /* 273 * isHiddenByPolicy - true if this layer has been forced invisible. 274 * just because this is false, doesn't mean isVisible() is true. 275 * For example if this layer has no active buffer, it may not be hidden by 276 * policy, but it still can not be visible. 277 */ 278 bool isHiddenByPolicy() const; 279 280 /* 281 * isFixedSize - true if content has a fixed size 282 */ 283 virtual bool isFixedSize() const = 0; 284 285 bool isPendingRemoval() const { return mPendingRemoval; } 286 287 void writeToProto(LayerProto* layerInfo, 288 LayerVector::StateSet stateSet = LayerVector::StateSet::Drawing); 289 290protected: 291 /* 292 * onDraw - draws the surface. 293 */ 294 virtual void onDraw(const RenderArea& renderArea, const Region& clip, 295 bool useIdentityTransform) const = 0; 296 297public: 298 virtual void setDefaultBufferSize(uint32_t w, uint32_t h) = 0; 299 300 void setGeometry(const sp<const DisplayDevice>& displayDevice, uint32_t z); 301 void forceClientComposition(int32_t hwcId); 302 bool getForceClientComposition(int32_t hwcId); 303 virtual void setPerFrameData(const sp<const DisplayDevice>& displayDevice) = 0; 304 305 // callIntoHwc exists so we can update our local state and call 306 // acceptDisplayChanges without unnecessarily updating the device's state 307 void setCompositionType(int32_t hwcId, HWC2::Composition type, bool callIntoHwc = true); 308 HWC2::Composition getCompositionType(int32_t hwcId) const; 309 void setClearClientTarget(int32_t hwcId, bool clear); 310 bool getClearClientTarget(int32_t hwcId) const; 311 void updateCursorPosition(const sp<const DisplayDevice>& hw); 312 313 /* 314 * called after page-flip 315 */ 316 virtual void onLayerDisplayed(const sp<Fence>& releaseFence); 317 318 virtual void abandon() = 0; 319 320 virtual bool shouldPresentNow(const DispSync& dispSync) const = 0; 321 virtual void setTransformHint(uint32_t orientation) const = 0; 322 323 /* 324 * called before composition. 325 * returns true if the layer has pending updates. 326 */ 327 virtual bool onPreComposition(nsecs_t refreshStartTime) = 0; 328 329 /* 330 * called after composition. 331 * returns true if the layer latched a new buffer this frame. 332 */ 333 virtual bool onPostComposition(const std::shared_ptr<FenceTime>& glDoneFence, 334 const std::shared_ptr<FenceTime>& presentFence, 335 const CompositorTiming& compositorTiming) = 0; 336 337 // If a buffer was replaced this frame, release the former buffer 338 virtual void releasePendingBuffer(nsecs_t dequeueReadyTime) = 0; 339 340 /* 341 * draw - performs some global clipping optimizations 342 * and calls onDraw(). 343 */ 344 void draw(const RenderArea& renderArea, const Region& clip) const; 345 void draw(const RenderArea& renderArea, bool useIdentityTransform) const; 346 void draw(const RenderArea& renderArea) const; 347 348 /* 349 * doTransaction - process the transaction. This is a good place to figure 350 * out which attributes of the surface have changed. 351 */ 352 uint32_t doTransaction(uint32_t transactionFlags); 353 354 /* 355 * setVisibleRegion - called to set the new visible region. This gives 356 * a chance to update the new visible region or record the fact it changed. 357 */ 358 void setVisibleRegion(const Region& visibleRegion); 359 360 /* 361 * setCoveredRegion - called when the covered region changes. The covered 362 * region corresponds to any area of the surface that is covered 363 * (transparently or not) by another surface. 364 */ 365 void setCoveredRegion(const Region& coveredRegion); 366 367 /* 368 * setVisibleNonTransparentRegion - called when the visible and 369 * non-transparent region changes. 370 */ 371 void setVisibleNonTransparentRegion(const Region& visibleNonTransparentRegion); 372 373 /* 374 * latchBuffer - called each time the screen is redrawn and returns whether 375 * the visible regions need to be recomputed (this is a fairly heavy 376 * operation, so this should be set only if needed). Typically this is used 377 * to figure out if the content or size of a surface has changed. 378 */ 379 virtual Region latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime) = 0; 380 virtual bool isBufferLatched() const = 0; 381 382 bool isPotentialCursor() const { return mPotentialCursor; } 383 /* 384 * called with the state lock from a binder thread when the layer is 385 * removed from the current list to the pending removal list 386 */ 387 void onRemovedFromCurrentState(); 388 389 /* 390 * called with the state lock from the main thread when the layer is 391 * removed from the pending removal list 392 */ 393 void onRemoved(); 394 395 // Updates the transform hint in our SurfaceFlingerConsumer to match 396 // the current orientation of the display device. 397 void updateTransformHint(const sp<const DisplayDevice>& hw) const; 398 399 /* 400 * returns the rectangle that crops the content of the layer and scales it 401 * to the layer's size. 402 */ 403 Rect getContentCrop() const; 404 405 /* 406 * Returns if a frame is queued. 407 */ 408 bool hasQueuedFrame() const { 409 return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh; 410 } 411 412 int32_t getQueuedFrameCount() const { return mQueuedFrames; } 413 414 // ----------------------------------------------------------------------- 415 416 bool createHwcLayer(HWComposer* hwc, int32_t hwcId); 417 void destroyHwcLayer(int32_t hwcId); 418 void destroyAllHwcLayers(); 419 420 bool hasHwcLayer(int32_t hwcId) { return mHwcLayers.count(hwcId) > 0; } 421 422 HWC2::Layer* getHwcLayer(int32_t hwcId) { 423 if (mHwcLayers.count(hwcId) == 0) { 424 return nullptr; 425 } 426 return mHwcLayers[hwcId].layer; 427 } 428 429 // ----------------------------------------------------------------------- 430 431 void clearWithOpenGL(const RenderArea& renderArea) const; 432 void setFiltering(bool filtering); 433 bool getFiltering() const; 434 435 // only for debugging 436 inline const sp<GraphicBuffer>& getActiveBuffer() const { return mActiveBuffer; } 437 438 inline const State& getDrawingState() const { return mDrawingState; } 439 inline const State& getCurrentState() const { return mCurrentState; } 440 inline State& getCurrentState() { return mCurrentState; } 441 442 LayerDebugInfo getLayerDebugInfo() const; 443 444 /* always call base class first */ 445 static void miniDumpHeader(String8& result); 446 void miniDump(String8& result, int32_t hwcId) const; 447 void dumpFrameStats(String8& result) const; 448 void dumpFrameEvents(String8& result); 449 void clearFrameStats(); 450 void logFrameStats(); 451 void getFrameStats(FrameStats* outStats) const; 452 453 virtual std::vector<OccupancyTracker::Segment> getOccupancyHistory(bool forceFlush) = 0; 454 455 void onDisconnect(); 456 void addAndGetFrameTimestamps(const NewFrameEventsEntry* newEntry, 457 FrameEventHistoryDelta* outDelta); 458 459 virtual bool getTransformToDisplayInverse() const = 0; 460 461 Transform getTransform() const; 462 463 // Returns the Alpha of the Surface, accounting for the Alpha 464 // of parent Surfaces in the hierarchy (alpha's will be multiplied 465 // down the hierarchy). 466 half getAlpha() const; 467 half4 getColor() const; 468 469 void traverseInReverseZOrder(LayerVector::StateSet stateSet, 470 const LayerVector::Visitor& visitor); 471 void traverseInZOrder(LayerVector::StateSet stateSet, const LayerVector::Visitor& visitor); 472 473 void traverseChildrenInZOrder(LayerVector::StateSet stateSet, 474 const LayerVector::Visitor& visitor); 475 476 size_t getChildrenCount() const; 477 void addChild(const sp<Layer>& layer); 478 // Returns index if removed, or negative value otherwise 479 // for symmetry with Vector::remove 480 ssize_t removeChild(const sp<Layer>& layer); 481 sp<Layer> getParent() const { return mCurrentParent.promote(); } 482 bool hasParent() const { return getParent() != nullptr; } 483 Rect computeScreenBounds(bool reduceTransparentRegion = true) const; 484 bool setChildLayer(const sp<Layer>& childLayer, int32_t z); 485 bool setChildRelativeLayer(const sp<Layer>& childLayer, 486 const sp<IBinder>& relativeToHandle, int32_t relativeZ); 487 488 // Copy the current list of children to the drawing state. Called by 489 // SurfaceFlinger to complete a transaction. 490 void commitChildList(); 491 int32_t getZ() const; 492 493protected: 494 // constant 495 sp<SurfaceFlinger> mFlinger; 496 /* 497 * Trivial class, used to ensure that mFlinger->onLayerDestroyed(mLayer) 498 * is called. 499 */ 500 class LayerCleaner { 501 sp<SurfaceFlinger> mFlinger; 502 wp<Layer> mLayer; 503 504 protected: 505 ~LayerCleaner() { 506 // destroy client resources 507 mFlinger->onLayerDestroyed(mLayer); 508 } 509 510 public: 511 LayerCleaner(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 512 : mFlinger(flinger), mLayer(layer) {} 513 }; 514 515 virtual void onFirstRef(); 516 517 friend class SurfaceInterceptor; 518 519 void commitTransaction(const State& stateToCommit); 520 521 uint32_t getEffectiveUsage(uint32_t usage) const; 522 523 FloatRect computeCrop(const sp<const DisplayDevice>& hw) const; 524 // Compute the initial crop as specified by parent layers and the 525 // SurfaceControl for this layer. Does not include buffer crop from the 526 // IGraphicBufferProducer client, as that should not affect child clipping. 527 // Returns in screen space. 528 Rect computeInitialCrop(const sp<const DisplayDevice>& hw) const; 529 530 // drawing 531 void clearWithOpenGL(const RenderArea& renderArea, float r, float g, float b, 532 float alpha) const; 533 534 void setParent(const sp<Layer>& layer); 535 536 LayerVector makeTraversalList(LayerVector::StateSet stateSet); 537 void addZOrderRelative(const wp<Layer>& relative); 538 void removeZOrderRelative(const wp<Layer>& relative); 539 540 class SyncPoint { 541 public: 542 explicit SyncPoint(uint64_t frameNumber) 543 : mFrameNumber(frameNumber), mFrameIsAvailable(false), mTransactionIsApplied(false) {} 544 545 uint64_t getFrameNumber() const { return mFrameNumber; } 546 547 bool frameIsAvailable() const { return mFrameIsAvailable; } 548 549 void setFrameAvailable() { mFrameIsAvailable = true; } 550 551 bool transactionIsApplied() const { return mTransactionIsApplied; } 552 553 void setTransactionApplied() { mTransactionIsApplied = true; } 554 555 private: 556 const uint64_t mFrameNumber; 557 std::atomic<bool> mFrameIsAvailable; 558 std::atomic<bool> mTransactionIsApplied; 559 }; 560 561 // SyncPoints which will be signaled when the correct frame is at the head 562 // of the queue and dropped after the frame has been latched. Protected by 563 // mLocalSyncPointMutex. 564 Mutex mLocalSyncPointMutex; 565 std::list<std::shared_ptr<SyncPoint>> mLocalSyncPoints; 566 567 // SyncPoints which will be signaled and then dropped when the transaction 568 // is applied 569 std::list<std::shared_ptr<SyncPoint>> mRemoteSyncPoints; 570 571 // Returns false if the relevant frame has already been latched 572 bool addSyncPoint(const std::shared_ptr<SyncPoint>& point); 573 574 void pushPendingState(); 575 void popPendingState(State* stateToCommit); 576 bool applyPendingStates(State* stateToCommit); 577 578 void clearSyncPoints(); 579 580 // Returns mCurrentScaling mode (originating from the 581 // Client) or mOverrideScalingMode mode (originating from 582 // the Surface Controller) if set. 583 virtual uint32_t getEffectiveScalingMode() const = 0; 584 585public: 586 /* 587 * The layer handle is just a BBinder object passed to the client 588 * (remote process) -- we don't keep any reference on our side such that 589 * the dtor is called when the remote side let go of its reference. 590 * 591 * LayerCleaner ensures that mFlinger->onLayerDestroyed() is called for 592 * this layer when the handle is destroyed. 593 */ 594 class Handle : public BBinder, public LayerCleaner { 595 public: 596 Handle(const sp<SurfaceFlinger>& flinger, const sp<Layer>& layer) 597 : LayerCleaner(flinger, layer), owner(layer) {} 598 599 wp<Layer> owner; 600 }; 601 602 sp<IBinder> getHandle(); 603 const String8& getName() const; 604 virtual void notifyAvailableFrames() = 0; 605 virtual PixelFormat getPixelFormat() const = 0; 606 bool getPremultipledAlpha() const; 607 608protected: 609 // ----------------------------------------------------------------------- 610 611 bool mPremultipliedAlpha; 612 String8 mName; 613 String8 mTransactionName; // A cached version of "TX - " + mName for systraces 614 615 bool mPrimaryDisplayOnly = false; 616 617 // these are protected by an external lock 618 State mCurrentState; 619 State mDrawingState; 620 volatile int32_t mTransactionFlags; 621 622 // Accessed from main thread and binder threads 623 Mutex mPendingStateMutex; 624 Vector<State> mPendingStates; 625 626 // thread-safe 627 volatile int32_t mQueuedFrames; 628 volatile int32_t mSidebandStreamChanged; // used like an atomic boolean 629 630 // Timestamp history for UIAutomation. Thread safe. 631 FrameTracker mFrameTracker; 632 633 // Timestamp history for the consumer to query. 634 // Accessed by both consumer and producer on main and binder threads. 635 Mutex mFrameEventHistoryMutex; 636 ConsumerFrameEventHistory mFrameEventHistory; 637 FenceTimeline mAcquireTimeline; 638 FenceTimeline mReleaseTimeline; 639 640 // main thread 641 int mActiveBufferSlot; 642 sp<GraphicBuffer> mActiveBuffer; 643 sp<NativeHandle> mSidebandStream; 644 Rect mCurrentCrop; 645 uint32_t mCurrentTransform; 646 // We encode unset as -1. 647 int32_t mOverrideScalingMode; 648 bool mCurrentOpacity; 649 std::atomic<uint64_t> mCurrentFrameNumber; 650 bool mFrameLatencyNeeded; 651 // Whether filtering is forced on or not 652 bool mFiltering; 653 // Whether filtering is needed b/c of the drawingstate 654 bool mNeedsFiltering; 655 // The mesh used to draw the layer in GLES composition mode 656 mutable Mesh mMesh; 657 658 bool mPendingRemoval = false; 659 660 // HWC items, accessed from the main thread 661 struct HWCInfo { 662 HWCInfo() 663 : hwc(nullptr), 664 layer(nullptr), 665 forceClientComposition(false), 666 compositionType(HWC2::Composition::Invalid), 667 clearClientTarget(false) {} 668 669 HWComposer* hwc; 670 HWC2::Layer* layer; 671 bool forceClientComposition; 672 HWC2::Composition compositionType; 673 bool clearClientTarget; 674 Rect displayFrame; 675 FloatRect sourceCrop; 676 HWComposerBufferCache bufferCache; 677 }; 678 679 // A layer can be attached to multiple displays when operating in mirror mode 680 // (a.k.a: when several displays are attached with equal layerStack). In this 681 // case we need to keep track. In non-mirror mode, a layer will have only one 682 // HWCInfo. This map key is a display layerStack. 683 std::unordered_map<int32_t, HWCInfo> mHwcLayers; 684 685 // page-flip thread (currently main thread) 686 bool mProtectedByApp; // application requires protected path to external sink 687 688 // protected by mLock 689 mutable Mutex mLock; 690 691 const wp<Client> mClientRef; 692 693 // This layer can be a cursor on some displays. 694 bool mPotentialCursor; 695 696 // Local copy of the queued contents of the incoming BufferQueue 697 mutable Mutex mQueueItemLock; 698 Condition mQueueItemCondition; 699 Vector<BufferItem> mQueueItems; 700 std::atomic<uint64_t> mLastFrameNumberReceived; 701 bool mAutoRefresh; 702 bool mFreezeGeometryUpdates; 703 704 // Child list about to be committed/used for editing. 705 LayerVector mCurrentChildren; 706 // Child list used for rendering. 707 LayerVector mDrawingChildren; 708 709 wp<Layer> mCurrentParent; 710 wp<Layer> mDrawingParent; 711}; 712 713// --------------------------------------------------------------------------- 714 715}; // namespace android 716 717#endif // ANDROID_LAYER_H 718